Re: mod_proxy chaining with a .pac file - OFF-TOPIC?

[Giovanni Donelli]

I am trying to make Apache follow the same rules as the browser

On Jan 23, 2008 2:34 PM, Joe Lewis <[EMAIL PROTECTED]> wrote:

> Giovanni Donelli wrote:
> > Take this pac file:
> > $ curl http://wpad.wws.lan/wpad.dat
> > function FindProxyForURL(url, host)
> > {
> > // simple hostname
> > if (dnsDomainLevels(host) == 0) {return "DIRECT";}
> >
> > // match Host against local domains (w/ optional :port)
> > var dom = /(127\.\d+\.\d+\.\d+|\.wws\.lan\.?|\.local\.?)(:\d+)?/;
> > if(dom.test(host)) { return "DIRECT"; }
> >
> > // All other requests go through port 8080 of proxy
> > // should that fail to respond, go direct:
> > return "PROXY proxy.wws.lan:8080; DIRECT";
> > }
> >
> > Obviously the browser needs to evaluate the URL each time it wants to
> make
> > an http request. So I want to do that in my proxy.
> >
> > Currently proxy chaning in mod_proxy supports only say:
> > ProxyRemote * x.y.z.w
> >
> > Now not having found mod_proxy can help me in that, I thought about
> writing
> > a mod that in apache would interpret a pac file. In my configuration,
> the
> > browser can not be aware of the pac file, only my proxy.
> >
> > I tried to explain you what was my project doing, instead of asking how
> > override the connection to a server.
> >
> > if this is not a subject of interest of this group, I do apologize for
> > having misunderstood the aim of it. However I still don't understand why
> > this should be offtopic.
> >
> > Giovanni
> >
> > PS: I couldn't figure out a way to search into archives from
> > http://mail-archives.apache.org/mod_mbox/httpd-modules-dev/. I used
> google
> > "site:" option, and found no entry for "pac" or wpad.
> >
> >
> >
> > On Jan 22, 2008 6:20 PM, Joe Lewis <[EMAIL PROTECTED]> wrote:
> >
> >
> >> First, I want to apologize for keeping this off-topic conversation one
> >> last time on the mailing list.  I think if we allow this to be
> archived,
> >> any questions should be more easily answered using archives, hopefully
> >> reducing our work load.
> >>
> >>
> >> Giovanni Donelli wrote:
> >>
> >>> Hi
> >>>Thanks for your reply. I do apologize for not being clear. I will
> >>> try to restate what I want to achieve. For the sake of this discussion
> >>> allow me to simplify the browser/internet interaction as follows:
> >>>
> >>> User enters URL in browser ->  **browser resolves domain name** ->
> >>> connect to server x -> HTTP request
> >>>
> >>> In the way the browser **resolves** the DNS is where the pac file is
> >>>
> >> used.
> >>
> >> You may want to read and understand the specification first.  Remember
> >> that browsers do not reconfigure each time a page is hit - they obtain
> >> the configuration once (via a direct URL to a .pac, a DHCP response, or
> >> a DNS lookup for a wpad hostname - it's in the spec).
> >>
> >> The only time in those activities that apache could be involved is in
> >> the direct URL to a .pac file - and it's a static .pac file you drop on
> >> the web server, or serve the proxy.dat file that the DHCP specified or
> >> the DNS method is trying to find.  In any way, nothing according to
> >> apache is occurring that is dynamic - it's just serving a .pac or .dat
> >> file.
> >>
> >> Which means there is no need to set up an apache module that handles
> >> stuff like this unless you are really crazy and want to construct a
> >> dynamically generated .pac/.dat file (I would not suggest this).
> >>
> >> If that is the direction you want to go, we may be able to assist -
> >> however, I doubt that is what you want.  Most proxy servers have static
> >> IP addresses, which means the .pac/.dat file should be static as well.
> >>
> >> Once again, may apologies to those who are expecting module development
> >> assistance in this as we're not sure we even need it yet.
> >>
> >> Joe
> >> --
> >> Joseph Lewis 
> >> "Divide the fire, and you will sooner put it out." - Publius Syrus
> >>
> >>
> >
> >
> Are you trying to make Apache follow the same rules as the browser when
> it proxies (as in a proxy that uses a proxy), or just trying to set it
> up?  (as in double proxy)?
>
> Joe
> --
> Joseph Lewis 
> "Divide the fire, and you will sooner put it out." - Publius Syrus
>

Re: mod_proxy chaining with a .pac file - OFF-TOPIC?

[Joe Lewis]

Giovanni Donelli wrote:

Take this pac file:
$ curl http://wpad.wws.lan/wpad.dat
function FindProxyForURL(url, host)
{
// simple hostname
if (dnsDomainLevels(host) == 0) {return "DIRECT";}

// match Host against local domains (w/ optional :port)
var dom = /(127\.\d+\.\d+\.\d+|\.wws\.lan\.?|\.local\.?)(:\d+)?/;
if(dom.test(host)) { return "DIRECT"; }

// All other requests go through port 8080 of proxy
// should that fail to respond, go direct:
return "PROXY proxy.wws.lan:8080; DIRECT";
}

Obviously the browser needs to evaluate the URL each time it wants to make
an http request. So I want to do that in my proxy.

Currently proxy chaning in mod_proxy supports only say:
ProxyRemote * x.y.z.w

Now not having found mod_proxy can help me in that, I thought about writing
a mod that in apache would interpret a pac file. In my configuration, the
browser can not be aware of the pac file, only my proxy.

I tried to explain you what was my project doing, instead of asking how
override the connection to a server.

if this is not a subject of interest of this group, I do apologize for
having misunderstood the aim of it. However I still don't understand why
this should be offtopic.

Giovanni

PS: I couldn't figure out a way to search into archives from
http://mail-archives.apache.org/mod_mbox/httpd-modules-dev/. I used google
"site:" option, and found no entry for "pac" or wpad.



On Jan 22, 2008 6:20 PM, Joe Lewis <[EMAIL PROTECTED]> wrote:

  

First, I want to apologize for keeping this off-topic conversation one
last time on the mailing list.  I think if we allow this to be archived,
any questions should be more easily answered using archives, hopefully
reducing our work load.


Giovanni Donelli wrote:


Hi
   Thanks for your reply. I do apologize for not being clear. I will
try to restate what I want to achieve. For the sake of this discussion
allow me to simplify the browser/internet interaction as follows:

User enters URL in browser ->  **browser resolves domain name** ->
connect to server x -> HTTP request

In the way the browser **resolves** the DNS is where the pac file is
  

used.

You may want to read and understand the specification first.  Remember
that browsers do not reconfigure each time a page is hit - they obtain
the configuration once (via a direct URL to a .pac, a DHCP response, or
a DNS lookup for a wpad hostname - it's in the spec).

The only time in those activities that apache could be involved is in
the direct URL to a .pac file - and it's a static .pac file you drop on
the web server, or serve the proxy.dat file that the DHCP specified or
the DNS method is trying to find.  In any way, nothing according to
apache is occurring that is dynamic - it's just serving a .pac or .dat
file.

Which means there is no need to set up an apache module that handles
stuff like this unless you are really crazy and want to construct a
dynamically generated .pac/.dat file (I would not suggest this).

If that is the direction you want to go, we may be able to assist -
however, I doubt that is what you want.  Most proxy servers have static
IP addresses, which means the .pac/.dat file should be static as well.

Once again, may apologies to those who are expecting module development
assistance in this as we're not sure we even need it yet.

Joe
--
Joseph Lewis 
"Divide the fire, and you will sooner put it out." - Publius Syrus




  
Are you trying to make Apache follow the same rules as the browser when 
it proxies (as in a proxy that uses a proxy), or just trying to set it 
up?  (as in double proxy)?


Joe
--
Joseph Lewis 
"Divide the fire, and you will sooner put it out." - Publius Syrus

Re: mod_proxy chaining with a .pac file - OFF-TOPIC?

[Giovanni Donelli]

Take this pac file:
$ curl http://wpad.wws.lan/wpad.dat
function FindProxyForURL(url, host)
{
// simple hostname
if (dnsDomainLevels(host) == 0) {return "DIRECT";}

// match Host against local domains (w/ optional :port)
var dom = /(127\.\d+\.\d+\.\d+|\.wws\.lan\.?|\.local\.?)(:\d+)?/;
if(dom.test(host)) { return "DIRECT"; }

// All other requests go through port 8080 of proxy
// should that fail to respond, go direct:
return "PROXY proxy.wws.lan:8080; DIRECT";
}

Obviously the browser needs to evaluate the URL each time it wants to make
an http request. So I want to do that in my proxy.

Currently proxy chaning in mod_proxy supports only say:
ProxyRemote * x.y.z.w

Now not having found mod_proxy can help me in that, I thought about writing
a mod that in apache would interpret a pac file. In my configuration, the
browser can not be aware of the pac file, only my proxy.

I tried to explain you what was my project doing, instead of asking how
override the connection to a server.

if this is not a subject of interest of this group, I do apologize for
having misunderstood the aim of it. However I still don't understand why
this should be offtopic.

Giovanni

PS: I couldn't figure out a way to search into archives from
http://mail-archives.apache.org/mod_mbox/httpd-modules-dev/. I used google
"site:" option, and found no entry for "pac" or wpad.



On Jan 22, 2008 6:20 PM, Joe Lewis <[EMAIL PROTECTED]> wrote:

> First, I want to apologize for keeping this off-topic conversation one
> last time on the mailing list.  I think if we allow this to be archived,
> any questions should be more easily answered using archives, hopefully
> reducing our work load.
>
>
> Giovanni Donelli wrote:
> > Hi
> >Thanks for your reply. I do apologize for not being clear. I will
> > try to restate what I want to achieve. For the sake of this discussion
> > allow me to simplify the browser/internet interaction as follows:
> >
> > User enters URL in browser ->  **browser resolves domain name** ->
> > connect to server x -> HTTP request
> >
> > In the way the browser **resolves** the DNS is where the pac file is
> used.
>
> You may want to read and understand the specification first.  Remember
> that browsers do not reconfigure each time a page is hit - they obtain
> the configuration once (via a direct URL to a .pac, a DHCP response, or
> a DNS lookup for a wpad hostname - it's in the spec).
>
> The only time in those activities that apache could be involved is in
> the direct URL to a .pac file - and it's a static .pac file you drop on
> the web server, or serve the proxy.dat file that the DHCP specified or
> the DNS method is trying to find.  In any way, nothing according to
> apache is occurring that is dynamic - it's just serving a .pac or .dat
> file.
>
> Which means there is no need to set up an apache module that handles
> stuff like this unless you are really crazy and want to construct a
> dynamically generated .pac/.dat file (I would not suggest this).
>
> If that is the direction you want to go, we may be able to assist -
> however, I doubt that is what you want.  Most proxy servers have static
> IP addresses, which means the .pac/.dat file should be static as well.
>
> Once again, may apologies to those who are expecting module development
> assistance in this as we're not sure we even need it yet.
>
> Joe
> --
> Joseph Lewis 
> "Divide the fire, and you will sooner put it out." - Publius Syrus
>

Re: mod_proxy chaining with a .pac file - OFF-TOPIC?

[Joe Lewis]

First, I want to apologize for keeping this off-topic conversation one 
last time on the mailing list.  I think if we allow this to be archived, 
any questions should be more easily answered using archives, hopefully 
reducing our work load.



Giovanni Donelli wrote:

Hi
   Thanks for your reply. I do apologize for not being clear. I will 
try to restate what I want to achieve. For the sake of this discussion 
allow me to simplify the browser/internet interaction as follows:


User enters URL in browser ->  **browser resolves domain name** -> 
connect to server x -> HTTP request


In the way the browser **resolves** the DNS is where the pac file is used.


You may want to read and understand the specification first.  Remember 
that browsers do not reconfigure each time a page is hit - they obtain 
the configuration once (via a direct URL to a .pac, a DHCP response, or 
a DNS lookup for a wpad hostname - it's in the spec).


The only time in those activities that apache could be involved is in 
the direct URL to a .pac file - and it's a static .pac file you drop on 
the web server, or serve the proxy.dat file that the DHCP specified or 
the DNS method is trying to find.  In any way, nothing according to 
apache is occurring that is dynamic - it's just serving a .pac or .dat file.


Which means there is no need to set up an apache module that handles 
stuff like this unless you are really crazy and want to construct a 
dynamically generated .pac/.dat file (I would not suggest this).


If that is the direction you want to go, we may be able to assist - 
however, I doubt that is what you want.  Most proxy servers have static 
IP addresses, which means the .pac/.dat file should be static as well.


Once again, may apologies to those who are expecting module development 
assistance in this as we're not sure we even need it yet.


Joe
--
Joseph Lewis 
"Divide the fire, and you will sooner put it out." - Publius Syrus